PSI_ESEI

Attributes are optional by default. To specify that the attribute is required, use the "use" attribute: <xs:attribute name="lang" type="xs:string" use="required"/>

Restrictions on a Set of Values To limit the content of an XML element to a set of acceptable values, we would use the enumeration constraint.

<xs:restriction base="xs:string"> <xs:enumeration value="Audi"/> <xs:enumeration value="Golf"/> <xs:enumeration value="BMW"/> </xs:restriction>

type="carType"/>

<xs:simpleType name="carType">

the type "carType" can be used by other elements

series of numbers or letters that can be used, we would use the pattern constraint.

<xs:minLength value="5"/> <xs:maxLength value="8"/>

<xs:pattern value="male|female"/>

The whiteSpace constraint is set to "preserve", which means that the XML processor WILL NOT remove any white space characters:

<xs:whiteSpace value="preserve"/>

The whiteSpace constraint is set to "replace", which means that the XML processor WILL REPLACE all white space characters (line feeds, tabs, spaces, and carriage returns) with spaces:

<xs:whiteSpace value="replace"/>

<xs:length value="8"/>

<xs:restriction base="xs:string"> <xs:pattern value="[a-z]"/>

Constraint Description enumeration Defines a list of acceptable values fractionDigits Specifies the maximum number of decimal places allowed. Must be equal to or greater than zero length Specifies the exact number of characters or list items allowed. Must be equal to or greater than zero maxExclusive Specifies the upper bounds for numeric values (the value must be less than this value) maxInclusive Specifies the upper bounds for numeric values (the value must be less than or equal to this value) maxLength Specifies the maximum number of characters or list items allowed. Must be equal to or greater than zero minExclusive Specifies the lower bounds for numeric values (the value must be greater than this value) minInclusive Specifies the lower bounds for numeric values (the value must be greater than or equal to this value) minLength Specifies the minimum number of characters or list items allowed. Must be equal to or greater than zero pattern Defines the exact sequence of characters that are acceptable totalDigits Specifies the exact number of digits allowed. Must be greater than zero whiteSpace Specifies how white space (line feeds, tabs, spaces, and carriage returns) is handled

<xs:complexType name="fullpersoninfo"> <xs:complexContent> <xs:extension base="personinfo">

Nmtoken   ::=    (NameChar)+